Anatomie et fonctionnement des reins

The urinary system consists of: Two kidneys that secrete and excrete urine. Excretory ducts that carry urine from the kidneys to the bladder: the calyces, renal pelvis, and ureters. A urine reservoir in the middle of urination: the bladder. An excretory duct: the urethra. This system contributes to the maintenance of homeostasis through a combination of complex processes including: Filtration of waste products from the blood. Selective reabsorption of water and solutes. Excretion of waste products and excess water in the urine. It also performs (via the kidneys) essential endocrine functions for the proper functioning of the body by synthesizing various hormones: Renin (regulation of blood pressure) Erythropoietin: regulation of red blood cell production and maturation Prostaglandin, kallikrein… Hydrolysis (activation) of vitamin D.